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Datamation: Virtual Servers update

A lot has happened in the last nine months of 2009 since we wrote our update on virtual servers. Citrix has made Xen Server free and released a new version 5.5 in mid 2009. Microsoft has released R2 of Windows Server 2008 that extends Hyper V in new and useful ways, and adds support for Red Hat Linux guest OSs finally. And VMware has come out with about 57 new products mostly labeled version 4 to manage and integrate their line, and handle greater densities of VMs per server.